Need more controls on stroke customisation

means you need to press Cmd + D and then union both (since union can’t be created with one object only)

Got it! Thus, in this instance, we have both controls to control the applied stroke as well as the original path’s stroke.

Yep! Non destructive method. I’m not sure you can do something like this in Illustrator even, I think all methods in Illustrator would be destructive.

You just have to manage the calculations for your path and stroke. Example: If you want to create an icon with a 1px stroke, you need to give 0.5px to the path and 0.5px to the stroke to manipulate it.